Antenna



FIG. 1 is a top perspective view of an antenna of the present invention;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines illustrate a portion of the antenna that forms no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 